Third Day may sing of heaven above, but their music comes wrapped in Southern rock's earthy tones. The Georgia act, steeped in both down-home twang and contemporary worship music, tackles questions of faith in ways that are fervent yet understated. An early hit, 1996's “Forever” pivots on jam-band swing and Mac Powell's gospel-kissed baritone. “I Believe” is significantly more measured, with meditative harmonies resting on warm organ chords. Released in 2015, Lead Us Back: Songs of Worship finds the band fully embracing praise with rousing, participatory productions like “Soul On Fire.”